MobileWizardry and Mobile Digital Media (MDM) have announced the release of an official Atari 2600 emulator, named Atari Retro. Retro ESP32 is the ultimate feature packed Odroid Go Launcher. As in this emulator, you will find old arcade games like Double Dragon, Alien, Blade Master, and Altered Beast, all these games simply come pre-loaded.
There is no legal precedent for ripping and downloading ROMs for games you own, though an argument could be made for fair use.